| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | studies have [vb pp] [noun] of | 10 |
|
| 2 | studies [vb base] [vb pp] [noun pl] of | 5 |
|
| 3 | studies [vb base] [vb pp] [noun sg] of | 5 |
|
